The National Electrical Manufacturers Association (NEMA) published American National Standard for Roadway and Area Lighting Equipment—Metering Performance Requirements for LED Drivers with Integral Energy Measurement (ANSI C136.52-2021). This new standard establishes acceptable metering performance criteria for LED drivers with built-in (integral to the driver) energy consumption measurement functionality for use in outdoor luminaire applications. It describes two metering device performance levels for roadway and area lighting applications: 2% Accuracy Class and 5% Accuracy Class.
This standard is written for use by roadway and area lighting component manufacturers, municipal and regional governments specifying outdoor lighting solutions, and street lighting offices/bureaus. ANSI C136.52-2021 is available on the NEMA website for $70.